Hi Jim,

This is normal, the version of the app you are working with keeps a maximum number of points on screen at a time (otherwise refreshing the screen gets too slow). I just released a new version of the app that allows you to increase the number of points on screen and/or scroll backwards through the data. It’s in beta, but if you’re interested you can get it here:

https://play.google.com/apps/testing/com.mooshim.mooshimeter

Best
~James